https://security-tracker.debian.org/tracker/DSA-6437-1
Integer Overflow or Wraparound vulnerability in apr_base64 functions of Apache Portable Runtime Utility (APR-util) allows an attacker to write beyond bounds of a buffer. This issue affects Apache Portable Runtime Utility (APR-util) 1.6.1 and prior versions.
security update
https://security-tracker.debian.org/tracker/DSA-5650-1